#!/usr/bin/env node

const assert = require("assert");
const cp = require("child_process");
const crypto = require("crypto");
const net = require("net");
const path = require("path");

const repo = path.resolve(__dirname, "..");
const project = path.join(repo, "examples/launch-build-demo");
const agentPublicKey = "agent-cli-smoke-public-key";

function sha256(value) {
  return `sha256:${crypto.createHash("sha256").update(value).digest("hex")}`;
}

function waitForJsonLine(child) {
  return new Promise((resolve, reject) => {
    let buffer = "";
    child.stdout.on("data", (chunk) => {
      buffer += chunk.toString();
      const newline = buffer.indexOf("\n");
      if (newline < 0) return;
      try {
        resolve(JSON.parse(buffer.slice(0, newline).trim()));
      } catch (error) {
        reject(error);
      }
    });
    child.once("exit", (code) => {
      reject(new Error(`process exited before JSON line with code ${code}`));
    });
  });
}

function send(addr, message) {
  return new Promise((resolve, reject) => {
    const socket = net.connect(addr.port, addr.host, () => {
      socket.write(`${JSON.stringify(message)}\n`);
    });
    let buffer = "";
    socket.on("data", (chunk) => {
      buffer += chunk.toString();
      const newline = buffer.indexOf("\n");
      if (newline < 0) return;
      socket.end();
      try {
        resolve(JSON.parse(buffer.slice(0, newline)));
      } catch (error) {
        reject(error);
      }
    });
    socket.on("error", reject);
  });
}

function runCli(args, env = {}) {
  return new Promise((resolve, reject) => {
    const child = cp.spawn(
      "cargo",
      ["run", "-q", "-p", "disasmer-cli", "--bin", "disasmer", "--", ...args],
      {
        cwd: repo,
        env: {
          ...process.env,
          ...env
        }
      }
    );
    const cliPid = child.pid;
    let stdout = "";
    let stderr = "";
    child.stdout.on("data", (chunk) => {
      stdout += chunk.toString();
    });
    child.stderr.on("data", (chunk) => {
      stderr += chunk.toString();
    });
    child.on("exit", (code) => {
      if (code !== 0) {
        reject(new Error(`CLI run failed with code ${code}\n${stderr}`));
        return;
      }
      try {
        resolve({ pid: cliPid, report: JSON.parse(stdout) });
      } catch (error) {
        reject(new Error(`CLI output was not JSON: ${stdout}\n${error.stack || error.message}`));
      }
    });
  });
}

(async () => {
  const coordinator = cp.spawn(
    "cargo",
    [
      "run",
      "-q",
      "-p",
      "disasmer-coordinator",
      "--bin",
      "disasmer-coordinator",
      "--",
      "--listen",
      "127.0.0.1:0"
    ],
    { cwd: repo }
  );
  assert(Number.isInteger(coordinator.pid));

  try {
    const ready = await waitForJsonLine(coordinator);
    const [host, portText] = ready.listen.split(":");
    const addr = { host, port: Number(portText) };
    assert.strictEqual((await send(addr, { type: "ping" })).type, "pong");

    const { pid: cliPid, report } = await runCli(
      ["run", "--coordinator", `${addr.host}:${addr.port}`, "--project", project, "--json"],
      { DISASMER_AGENT_PUBLIC_KEY: agentPublicKey }
    );
    assert(Number.isInteger(cliPid));
    assert.notStrictEqual(cliPid, coordinator.pid);
    assert.strictEqual(report.plan.entry, "build");
    assert.deepStrictEqual(report.plan.session, {
      AgentPublicKey: {
        agent: "agent",
        public_key_fingerprint: sha256(agentPublicKey),
        browser_interaction_required: false
      }
    });
    assert.strictEqual(report.boundary.cli_process_started_node_process, true);
    assert.strictEqual(report.boundary.cli_process_started_coordinator_process, false);
    assert(Number.isInteger(report.boundary.spawned_node_process_id));
    assert.notStrictEqual(report.boundary.spawned_node_process_id, cliPid);
    assert.notStrictEqual(report.boundary.spawned_node_process_id, coordinator.pid);
    assert.strictEqual(report.boundary.node_session_requests, 10);
    assert.strictEqual(report.node_report.node_status, "completed");
    assert.strictEqual(report.node_report.status_code, 0);
    assert.strictEqual(report.node_report.large_bytes_uploaded, false);
    assert.strictEqual(report.node_report.capability_response.type, "node_capabilities_recorded");
    assert.strictEqual(report.node_report.task_assignment_response.type, "task_placement");
    assert.strictEqual(report.node_report.debug_command_response.type, "debug_command");
    assert.strictEqual(report.node_report.log_event_response.type, "task_log_recorded");
    assert.strictEqual(report.node_report.vfs_metadata_response.type, "vfs_metadata_recorded");
    assert.strictEqual(report.node_report.staged_artifact.path, "/vfs/artifacts/cli-run-output.txt");

    const events = await send(addr, {
      type: "list_task_events",
      tenant: "tenant",
      project: "project",
      actor_user: "user",
      process: "vp-cli-local"
    });
    assert.strictEqual(events.type, "task_events");
    assert.strictEqual(events.events.length, 1);
    assert.strictEqual(events.events[0].node, "node-cli-local");
    assert.strictEqual(events.events[0].process, "vp-cli-local");
    assert.strictEqual(events.events[0].task, "compile-linux");
    assert.strictEqual(events.events[0].artifact_path, "/vfs/artifacts/cli-run-output.txt");
  } finally {
    coordinator.kill("SIGTERM");
  }

  const { pid: autoCliPid, report: autoReport } = await runCli([
    "run",
    "--local",
    "--project",
    project,
    "--json",
  ]);
  assert(Number.isInteger(autoCliPid));
  assert.strictEqual(autoReport.plan.entry, "build");
  assert.deepStrictEqual(autoReport.plan.coordinator, "LocalOnly");
  assert.deepStrictEqual(autoReport.plan.session, "Anonymous");
  assert.strictEqual(autoReport.boundary.cli_process_started_node_process, true);
  assert.strictEqual(autoReport.boundary.cli_process_started_coordinator_process, true);
  assert.match(autoReport.boundary.coordinator_address, /^127\.0\.0\.1:\d+$/);
  assert(Number.isInteger(autoReport.boundary.coordinator_process_id));
  assert(Number.isInteger(autoReport.boundary.spawned_node_process_id));
  assert.notStrictEqual(autoReport.boundary.coordinator_process_id, autoCliPid);
  assert.notStrictEqual(autoReport.boundary.spawned_node_process_id, autoCliPid);
  assert.notStrictEqual(
    autoReport.boundary.spawned_node_process_id,
    autoReport.boundary.coordinator_process_id
  );
  assert.strictEqual(autoReport.boundary.node_session_requests, 10);
  assert.strictEqual(autoReport.node_report.node_status, "completed");
  assert.strictEqual(autoReport.node_report.status_code, 0);
  assert.strictEqual(autoReport.node_report.large_bytes_uploaded, false);
  assert.strictEqual(autoReport.node_report.capability_response.type, "node_capabilities_recorded");
  assert.strictEqual(autoReport.node_report.task_assignment_response.type, "task_placement");
  assert.strictEqual(autoReport.node_report.debug_command_response.type, "debug_command");
  assert.strictEqual(autoReport.node_report.log_event_response.type, "task_log_recorded");
  assert.strictEqual(autoReport.node_report.vfs_metadata_response.type, "vfs_metadata_recorded");
  assert.strictEqual(
    autoReport.node_report.staged_artifact.path,
    "/vfs/artifacts/cli-run-output.txt"
  );

  console.log("CLI local run smoke passed");
})().catch((error) => {
  console.error(error.stack || error.message);
  process.exit(1);
});